<template>
    <div>
        <div class="demo-upload-list" v-for="item in uploadList">
            <template v-if="item.status === 'finished'">
                <img :src="item.url">
                <div class="demo-upload-list-cover">
                    <Icon type="ios-eye-outline" @click.native="handleView(item.url)"></Icon>
                    <Icon type="ios-trash-outline" @click.native="handleRemove(item)"></Icon>
                </div>
            </template>
            <template v-else>
                <Progress v-if="item.showProgress" :percent="item.percentage" hide-info></Progress>
            </template>
        </div>
        <Upload ref="upload"
                :show-upload-list="false"
                :default-file-list="uploadConfig.default_list"
                :on-success="handleSuccess"
                :headers="uploadConfig.headers"
                :format="uploadConfig.format"
                :max-size="uploadConfig.max_size"
                :on-format-error="handleFormatError"
                :on-exceeded-size="handleMaxSize"
                :before-upload="handleBeforeUpload"
                :multiple="uploadConfig.multiple"
                :name="uploadConfig.file_name"
                type="drag"
                :action="uploadConfig.upload_url"
                style="display: inline-block;width:58px;">
            <div style="width: 58px;height:58px;line-height: 58px;">
                <Icon type="ios-camera" size="20"></Icon>
            </div>
        </Upload>
        <Modal title="图片预览" v-model="visible">
            <img :src="imgUrl" v-if="visible" style="width: 100%">
        </Modal>
        <!--<Divider orientation="left">点击预览图片</Divider>-->
        <!--<div class="galley-image-list">-->
            <!--<ul class="pictures  row l-hide" ref="galley">-->
                <!--<li v-for="(item,key) in formatFileList"><img :data-original="item.url" :src="item.url" alt=""></li>-->
            <!--</ul>-->
        <!--</div>-->

        <!-- <Collapse v-if="formatFileList.length > 0">
          <Panel name="1">
            预览
            <p slot="content">
              <img class="fancybox" :src="item.url" :alt="item.name" v-for="(item,key) in formatFileList" />
            </p>
          </Panel>
        </Collapse> -->
    </div>
</template>
<script>
  import {
    deleteAttachment
  } from '@/api/common'
  import Viewer from 'viewerjs';
  import 'viewerjs/dist/viewer.css';

  export default {
    props: {
      isDelete: {
        type: Boolean,
        default: false
      },
      uploadConfig: {
        type: Object,
        default: {
          headers: {
            'Authorization': window.access_token
          },
          format: ['jpg', 'jpeg', 'png', 'gif'],
          max_size: 800, // 800KB
          upload_url: window.uploadUrl.uploadTmp,
          file_name: 'file',
          multiple: false,
          file_num: 0,
          default_list: [{
            name: '',
            attachment_id: 0,
            url: ''
          }]
        }
      }
    },
    data() {
      return {
        imgUrl: '',     // 预览图片路径
        visible: false,

        uploadList: [],
        formatFileList: []
      }
    },
    methods: {
      handleView (url) {
        this.imgUrl = url;
        this.visible = true;
      },
      handleRemove(file) {
        const fileList = this.$refs.upload.fileList

        if (file.attachment_id > 0 && (this.isDelete === true)) {
          deleteAttachment(file.attachment_id).then(res => {
            this.$Notice.success({
              title: '操作成功',
              desc: '文件删除成功'
            })
          })
        }

        this.$refs.upload.fileList.splice(fileList.indexOf(file), 1)

        let formatFileList = this.fomatFile()
        this.$emit('input', formatFileList)
        this.$emit('on-upload-change', this.uploadList, formatFileList)
        this.ViewImage()
      },
      handleSuccess(res, file) {
        file.url = res.data.url
        file.name = res.data.original_name
        file.attachment_id = res.data.attachment_id

        let formatFileList = this.fomatFile()
        this.$emit('input', formatFileList)
        this.$emit('on-upload-change', this.uploadList, formatFileList)
        this.ViewImage()
      },
      fomatFile() {
        let formatFileList = []
        this.uploadList.forEach(function (value, index, array) {
          formatFileList.push({
            attachment_id: value.attachment_id,
            url: value.url
          })
        })
        this.formatFileList = formatFileList

        if (this.uploadConfig.file_num === 1) {
          formatFileList = formatFileList[0]
        }
        return formatFileList
      },
      handleFormatError(file) {
        this.$Notice.warning({
          title: '文件格式不正确',
          desc: '文件 ' + file.name + ' 格式不正确。'
        })
        this.ViewImage()
      },
      handleMaxSize(file) {
        this.$Notice.warning({
          title: '超出文件大小限制',
          desc: '文件 ' + file.name + ' 太大，不能超过 ' + this.uploadConfig.max_size + 'kb'
        })
        this.ViewImage()
      },
      handleBeforeUpload() {
        const check = this.uploadList.length < this.uploadConfig.file_num
        if (!check) {

          this.$Notice.warning({
            title: '数量限制',
            desc: '最多只能上传' + this.uploadConfig.file_num + '个文件'
          })
          this.ViewImage()
        }
        return check
      },
      ViewImage() {
        this.$nextTick(() => {
          $(function () {
            $('.l-hide').click(function () {
              $('.l-show').removeAttr('id').addClass('l-hide').removeClass('l-show');
              $(this).attr('id', 'galley');
              $(this).addClass('l-show');
              $(this).removeClass('l-hide');
              var galley = document.getElementById('galley');
              var viewer = new Viewer(galley, {
                url: 'data-original',
                toolbar: {
                  oneToOne: true,
                  prev: function () {
                    viewer.prev(true);
                  },
                  play: true,
                  next: function () {
                    viewer.next(true);
                  },
                  update: function () {

                  },
                  download: function () {
                    const a = document.createElement('a');

                    a.href = viewer.image.src;
                    a.download = viewer.image.alt;
                    document.body.appendChild(a);
                    a.click();
                    document.body.removeChild(a);
                  },
                },
              });
            });
          });
        });
      },
    },
    mounted() {
      this.uploadList = this.$refs.upload.fileList

      let formatFileList = this.fomatFile()
      if (formatFileList != 'undefined') {
        this.$emit('input', formatFileList)
        this.$emit('on-upload-change', this.uploadList, formatFileList)
      }
      this.ViewImage()
    },
  }
</script>
<style>
    .demo-upload-list {
        display: inline-block;
        width: 60px;
        height: 60px;
        text-align: center;
        line-height: 60px;
        border: 1px solid transparent;
        border-radius: 4px;
        overflow: hidden;
        background: #fff;
        position: relative;
        box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
        margin-right: 4px;
    }

    .demo-upload-list img {
        width: 100%;
        height: 100%;
    }

    .demo-upload-list-cover {
        display: none;
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, .6);
    }

    .demo-upload-list:hover .demo-upload-list-cover {
        display: block;
    }

    .demo-upload-list-cover i {
        color: #fff;
        font-size: 20px;
        cursor: pointer;
        margin: 0 2px;
    }

    .fancybox {
        max-width: 100%
    }
</style>
